Periscope.



H. JACOB & J. HUMBREGHT.

PERISGOPB.

APPLICATION FILED JULY 26,1910.

Patented June 2, 1914,

* UNITED STATES PATENT OFFICE.

HEINRICH JACOB, OF STEGLI'IZ, AND JULES I IUMBRECHT,

NEAR BERLIN,

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GERMANY, ASSIGNORS TO THE FIRM OF OPTISCI-IE ANISTALT C. P.

GOERZ AKTIENGESELLSCHAFT, OF FRIEDENAU, NEAR BERLIN, GERMANY.

. P'ERIscoPE.

Specification of Letters Patent. Patented June 1914. I

Application filed July 26, 1910. Serial No. 573,961.

To all whom it may concern Be it known that we, HEINRICH JACOB and Jonas HUManEon'r, citizens of the German Empire, and residents of Steglitz, near Berlin, and Gross-Lichterfelde, near Berlin, respectively, Germany, have invented certain new and useful Improvements in and Relating to Peri-scopes, of which the followwith a transparent extension which sur-. rounds the reflector and preferably forms a cap on the casing. The transparent part or cap of the casing may-have'van'ous shapes; for instance, it may have the shape of a cylinder, or of a segment of a spherel When using a transparent cylinder for inclosing the rotatory-reflector, it is necessary to neutralize the distortion of the image caused by the cylinder. For this purpose, there may be arranged inside thetransparent cylinder fixed to, the casing, a cylinderlens connected with the reflector, and disposed at an angle of 90 to the transparent cylinder. The reflector may also be coupled with a positive c linder-lenswithout' angular displacement o the cylinder axes.

The reflector is usually formed by a reflecting surface of a prism, and in this case the prism surface infront of the reflecting surface. entrance may be so ground that the distortive effect of the transparent cylinder 1" is neutralized. When the rotatory reflector is mounted in a transparent hollow sphere, the distortive effect on the image may be taken into account in computing the optical system of the telesco e..

The invention is illustrated in the annexed drawings, as applied to a panorama periscope' Figure 1 is a longitudinal section of the entire instrument, Fig. 2 a longitudinal cross section of the ocular end of the instrument, taken in a planeat 90 tothe plane of Fig. 1, Figs. 3 and 4 are longitudinal sections illustrating twoforms of construe "side the tube 3. The ocular 7 in the massive tube 3.

' Fig. 1.

nection with .a beveled tion of the head piece of the eriscope. Fig, 5 is a fragmentary detail sectional view showing, on a larger scale than in Fig. l, the mechanism for actuating the image erecting prism on rotation of the entrance reflector.

In the instrument shown in Figs. 1 and 2, the rotatory reflector (Fig 1), is marked 1, and is mounted iIlH. light tube 2; ,The latter is surrounded by a massive jacket or mantle tube 3 and can be rotated therein by means of bevel gear wheels 4, 5, the wheel 5 being connected to a crank handle 6 outis arranged In the example shown in Fig. 1, the rotatory reflector 1 is inclosed by a transparent cylinderB making a liquid-tight joint with the tube 3 and closed at the top by a cap 9, also liquid-tight.

Fig. 3 shows more closely the connection of the transparent cylinder with the mantle. tube, and the closure of the upper end of.

the transparent cylinder by the cap 9. The cap 9 has an overhanging rim 10 serving as an elastic buffer to reduce the force of acci-. dental blows. The cylinder lens '11 placed in front of the reflector 1 and rigidly con 1 nected therewith, 'serVes to neutralize distortion of the image by the cylinder 8. The

lens 11 is s arranged that its axis is at right angles to the aXis of cylinder 8. i

In Fig. 4 the transparent mantle surthe transparent rounding the reflector 1 consists of asegment of a transparent sphere, with a metal oover or cap 13 at thetop, having a laterally projecting rim 14 of lateral blows.

The optical elements of anembodiment of a telescope provided with the new kindof mounting of the rotatable reflector are shown dlagrammatically in dotted lines in for reducing the effect and 15 designate a pairof lenses forming an image .producingsystem; thelenses 16!. and 16 form an image reverting system;

rotatably mounted in tube 2 and meshing with i In this figure the numerals 1 5 4 17 and 17" .form a'lens. combination for l gear'20. Mounted on the same stud 22 as gear a toothed beveled 21 is a further beveled gear 23 meshing with circle 24 mounted within This conthe mantle 3 of the instrument.

mantle 3 motion between the fixed outer and the rotatable inner tube 2icauses a rotion of the latter;

withimtube 2 on rota' the number of teeth of the several gears being so calculated that prism 19- is rotated with half the speed of tube '2 with reflector 1 as it is.necessary for tation of prism 19 obtaining upright images at arbitrary posi-' T tions of reflector 1 as is well known to those striking s mounted therein 'at rays of light with a cap havmga skilledin this special-branch of industry;

carrying an entrance reflector at the end adjacent the transparent extension of the man- "tle tube andopticahmeans for producing distant objects emitting rays from I further images aid entrance reflector an optical means feet of rotation of the entrance reflector.

'2. In a Periscope a mantle tube having a transparent extension liquid-tightly conmantle tube and provided laterally projecting rim nected with said I distorta ble by impact 'flector mounted a cylinder lens arranged. reflector and in firm connection therew1th,

pensate for the distorti structed as to form su specification in the for compensating f r the efand a rotatory tube placed within said mantle tube and carrying a reflector'at the end adjacent said transparent extension oft-he mantle tuber a 3. In a periscopea mantle tube having a cylindrical transparent extension, a rotatoryv tube placed within'said mantle tube, a re- I in said rotatory ,tube at the end adjacent the transparent extension,- and in front of. said said cylinder lens beingadapted to com- Y distan'ceobjects caused by the transparent cylindrical extension of said mantle tube. I 4:. In aperiscope, a mantle tube, a rotatory tube placed therein and carrying an ,entrancereflector for luminous rays, a transparent v c linder surroundingsald entrance reflector, andcurved transparent means in front of; said entrance reflector so con-'- stantially undistorted images from distant objects on said reflector and an-immovably mounted exit reflector for said rays. l r.

In testimony whereof we have signed this J presence of two subscribing witnesses HEINRICH Jhcon JULES HUMBRECHT. v Witnesses-i Y HENRY HAsPEn,

WOLDEMAR' nof the image of I 

